CSS-BB8X6 vs MTC-300BB8 — Compare
JBL Commercial CSS-BB8X6 8" Backcan For CSS8008, CSS8018 vs JBL MTC-300BB8 Backbox For 8" Control 300 Series Drivers
The CSS-BB8X6 is a compact, lightweight pack of six units optimized for CSS-8008/CSS-8018 speakers in distributed multi-speaker installations, while the MTC-300BB8 is a single, larger enclosure with MDF lining designed for deeper bass and resonance control with 8-inch Control 300 drivers. Choose the CSS-BB8X6 for bulk ceiling deployments needing multiple small backcans; choose the MTC-300BB8 for installations prioritizing low-frequency extension and acoustic isolation.
No sales tax on orders shipped outside California — total cost beats national retailers that charge sales tax in nearly every state.
JBL Commercial CSS-BB8X6 8" Backcan For CSS8008, CSS8018
JBL MTC-300BB8 Backbox For 8" Control 300 Series Drivers
Specs side by side
| JBL Commercial CSS-BB8X6 8" Backcan For CSS8008, CSS8018 | JBL MTC-300BB8 Backbox For 8" Control 300 Series Drivers | |
|---|---|---|
| Price | $194.68 | $178.28 |
| Brand | JBL | JBL |
| Condition | New | New |
Why choose JBL Commercial CSS-BB8X6 8" Backcan For CSS8008, CSS8018
- ✓ Pack of 6 units for cost-effective multi-speaker projects
- ✓ Lighter weight (0.87 kg per unit) and compact 334 mm diameter for tight ceiling spaces
- ✓ Direct compatibility with CSS-8008 and CSS-8018 commercial ceiling speakers
- ✓ Lower profile (108 mm depth) minimizes cavity intrusion
Why choose JBL MTC-300BB8 Backbox For 8" Control 300 Series Drivers
- ✓ MDF lining provides superior resonance elimination and extended bass response
- ✓ Larger internal volume (0.71 cu ft) acoustically optimizes 8-inch driver performance
- ✓ Thicker 16 gauge metal construction with vibration damping
- ✓ Standardized 310 mm ceiling cutout fits common drop-ceiling grids
Frequently asked questions
Which backbox delivers better bass response?
The MTC-300BB8 delivers extended bass response due to its 12 mm MDF lining and larger optimized internal volume (0.71 cu ft) specifically tuned for 8-inch driver performance. The CSS-BB8X6 provides 4.0 liters (0.15 cu ft) per unit, suitable for ceiling projection but not designed for low-frequency extension.
Can I use either backbox with any 8-inch ceiling speaker?
No. The CSS-BB8X6 is engineered for JBL CSS-8008 and CSS-8018 speakers with a 286 mm bolt circle. The MTC-300BB8 is designed for JBL Control 300 Series 8-inch drivers. Using the wrong backcan may result in poor acoustic performance or incompatible mounting.
Which is better for large multi-speaker installations?
The CSS-BB8X6 is more practical for distributed systems because it comes in a pack of six, reducing per-unit cost and simplifying ordering for projects requiring many ceiling speakers across wide areas.
Are both approved for air-handling plenums?
Yes. Both are certified under U.L.-2043, U.L.-1480, NFPA90, and NFPA70 (or NFPA70A), making them safe for installation in air-handling spaces and plenum areas in commercial buildings.